An art deco style necklace featuring a black onyx gemstone below a mother of pearl decorated with sparkling marcasite gemstonesthis necklace comes with a 3cm extender full length 48cmmarcasite informationnumber of stones 2stone shape roundstone size 130mmcarat weight 003ctnaturalcreated natural marcasitecountry of origin austriablack onyx informationnumber of stones 1stone shape diamondstone size 18mm x 5mmcarat weight 1ctnaturalcreated natural black onyxcountry of origin b